ASHBURN, Va. (CBSDC) — The Washington Redskins will be without defensive end Adam Carriker and linebacker Brian Orakpo for the remainder of the season.

Carriker will need surgery after to repair the torn right quadriceps tendon he suffered early in the Washington Redskins 31-28 loss to the St. Louis Rams.

Head coach Mike Shanahan estimates Carriker will need five months to fully recover.

Doug Worthington is likely to be promoted off the team’s practice squad to take Carriker’s place on the roster.

Linebacker Brian Orakpo will also undergo a procedure after sustaining a second tear to his left pectoral muscle. Shanahan said an MRI showed the injury was in a different place than the first tear which required surgery this past offseason.

Recovery time for Orakpo’s injury is estimated at roughly four months.